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Commit 024f3d26 authored by George Burgess IV's avatar George Burgess IV
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[MSSA] Add special handling for invariant/constant loads. 

This is a follow-up to r277637. It teaches MemorySSA that invariant
loads (and loads of provably constant memory) are always liveOnEntry.

llvm-svn: 277640
parent 2e9675ff
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